Differential two-photon spectroscopic measurements of cold atoms temperature with variable angle between probe beams
Boris B. Zelener, E V Vilshanskaya, Sergey A. Saakyan +4 more
Abstract In this work, the differential two-photon spectroscopy with an adjustable angle between the beams is used for measurement of atomic temperatures in a working 40 Ca magneto-optical trap. It is demonstrated that it is possible to improve the accuracy of temperature measurements by selecting different angles. Experimental and theoretical studies of two-photon Rydberg transitions 4s 2 1 S 0 —50 1 S 0 in cold 40 Ca atoms by means of counter-propagating laser beams and laser beams with different angles are performed. By analyzing the spectral shapes, a dependence of Doppler broadening on frequency detuning of cooling laser beams is obtained. We have measured the temperature of 40 Ca atoms in the range from 4 to 8 mK for different values of the cooling laser detuning.
Laser Physics•Jan 9, 2020•1 citation